/*
 * Copyright (c) 2010 Frederic Daoud
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package com.fdaoud.rayures.action;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sourceforge.stripes.action.ActionBean;
import net.sourceforge.stripes.action.ForwardResolution;
import net.sourceforge.stripes.action.Resolution;
import net.sourceforge.stripes.config.Configuration;
import net.sourceforge.stripes.controller.ActionResolver;
import net.sourceforge.stripes.controller.StripesFilter;

/**
 *
 * @author Frederic Daoud
 */
public class ForwardToDefaultView implements Resolution {
  private String path;
  private Resolution resolution;

  /**
   * Forwards to default path.
   */
  public ForwardToDefaultView(ActionBean actionBean) {
    path = getDefaultPath(actionBean);
    resolution = new ForwardResolution(path);
  }

  public void execute(HttpServletRequest req, HttpServletResponse resp) throws Exception {
    resolution.execute(req, resp);
  }

  public String getPath() {
    return path;
  }

  /** Returns TODO. */
  public String getDefaultPath(ActionBean actionBean) {
    return getBasePath(actionBean.getClass())
      + getViewName(actionBean.getContext().getEventName())
      + getViewExtension();
  }

  /**
   * Returns the path from which to construct the default view path. This implementation returns the
   * fully qualified class name, prepended with a slash and with all periods replaced with slashes.
   */
  protected String getBasePath(Class<? extends ActionBean> actionBeanClass) {
    Configuration config = StripesFilter.getConfiguration();
    if (config == null) {
        throw new NullPointerException("Stripes Configuration is null");
    }
    ActionResolver actionResolver = config.getActionResolver();
    if (actionResolver == null) {
        throw new NullPointerException("Stripes ActionResolver is null");
    }
    return "/WEB-INF/jsp" + actionResolver.getUrlBinding(actionBeanClass);
  }

  /** Returns the view name, prepended with a slash. */
  protected String getViewName(String viewName) {
    return "/" + viewName;
  }

  /** Returns ".jsp". */
  protected String getViewExtension() {
    return ".jsp";
  }
}
